Portable water heater



G. w. HEWITT. PORTABLE WATER HEATER.

APPLICATION FILED APR. 16, 1921.

. Patented $1116 27, 1922.

UNITED, STATES PATENT OFFICE.

GEORGE W. HEWITT, OF BAKERSFIELD, CALIFQBNIA.

I PORTABLE W ER HEAT R.

To all whom it concern Be it known that I, GEORGE VV..-HEWITT, a citizenof the United States, residin at Bakersfield, in the county of Kern andtate of California, have invented a new and useful Portable WaterHeater, of which the following is a specification.

This invention relates to water heaters,

and has for its principal object to provide- Qa portable device forheating small quanticonnected and is taken on a ties of water which willbe. of such size and shape that, it may be conveniently carriedin atraveling bag or suitcase, and which will be of simple design andconsequently low production cost.

Referring to the drawing which is forillustrative purposes only:

Fig. 1 is a view showing an application of a portable water heaterembodying the features of my invention.

Fig. 2 is a vertical section through the water heater in whicha portionof one of the circulating chambers is cutaway to dis-" I employ, theheating element as herein shown being inverted from the position inwhich it is shown in Fig. 1.

As shown in t e drawing, in the practice of my invention I mploy acontainer 11 composed of a shell 12 and a cover 13. Enclosed within thecontainer 11 I provide water circulating chambers 14 and 15 whicharepreferably formed of a thin sheet metal shell 16 and areapproximately semiecircular in cross section flattened as indicated at17 to provide a space 18 between the circulating chamber 14 and thecontainer shell 12wfor the passage of an electric cord 20, and a space19 between the circulating chamber 15 and the container shell 12 toaccommodate bolts 25 which form connecting means for the straps 26 whichencircle .and bind to-' gether the circulating chambers 14 and 15.Between the circulating chambers 14 and 15. is inserted a heatingelement 30 com prised of'a-winding 31 supported upon a plate ofinsulating material, such as sheet mica, notched 33 to provide a meansof main- ,tricity supplied from an exterior .through the cord 20..

Specification of Letters Iatent. Patented J 119' 27,1922. Applicationfiled ilpril 16, 1921, Serial No. 461,792.

taining the winding 31 in 'position. The ends 35 of the heatlng elementwinding 31 are attached to binding posts 36 and 37 mounted in the micaplate 32, and to which binding posts'are connected, on the o posite sideof the plate 32, wires 38 which orm the cord 20. I

Onthe cover 13 is mounted a collar 40' fitted with an insulating bushing41 through which the cord 20 extends so that it may be conn cted bymeans of a plug 42 with a recepta le 43 located in an exterior circuit.Between the faces of the heating element '30 and the adjacent walls ofthe circulating chambers are placed insulatin sheets .45 to prevent thecontact of the winding with the circulating chamber walls, andunderneath the straps at the points adjacentto the heating element arealso placed small pieces 'of insulating material 46. Surroundmg theentire interior structure I provide I a wrapping 47 of asbestos paper toprevent the loss'of heat through the shell 12.

Water is admitted to the circulating chambers through a tube 50extending through the cover 13 into the circulating chamber 14.

'Itwill be perceived that the tube extends a considerable distance downinto the circulating chamber 14 and delivers the water to a point nearthe bottom thereof in order that a very complete circulation may bemaintained. Rising within the circulating chamber 15, the water passesthrough an in- .terconnecting tube 52 and is delivered into thecirculating chamber 15 in which it again rises and isexpelled through acurved outlet nozzle formed of a tube 55. During its passage through thecirculating chambers the water is heated by its contact with the wallsof the circulating chambers through which the heat generated by theheating element is conducted.

In Fig. 1 of the drawing I show the water heater connected to a basincock 60 by means of a length of rubber tubing 61 provided with adiaphragm coupling 62. In this ap- I claim as m invention:

, .1. In a liqui heater, thecombination of:

a flat heating element; a circulating chamber having a flat side;insulation between said element and said side; and means for holdingsaid element against said insulation.

a fiat heating element; a circulating cham-' her having a flat side; asecond circulating chamber also having a flat side; a containersurrounding said circulating chambers; means for'insulatin said elementbetween said flat sides; an means for pressing said fiat sides againstsaid means for insulating.

4. In a liquid heater, the combination of: a flat heating element acirculating chamber having a flat side; a second circulating chainberalso having a flat side; a container surrounding said circulatingchambers; means for admitting water through the wall of said containerand into one of said chambers; water conducting means connecting saidchambers; a water outlet for the other of said chambers; means forinsulating said element between said flat sides; and means for pressingsaid fiat sides against said means for insulating. x

5. In a liquid heater, the combination of: a fiat heating element; acirculating chamber having a flat side; a second circulating chamheralso 'havlng a flat side; a contalner surrounding said circulatingchambers; means for admitting water through the Wall of said containerand into one of said chambers; water conducting means connecting saidchambers; a Water outlet connected to the other of said chambers andpassing through the walls of said container; means for insulating saidelement between said flat sides; and means for pressing said flat sidesagainst said means for insulating.

6. In a liquid heater, the combination of: a flat heating element;aflexible cord connecting said heating element to an outside circuit; acirculating chamber having a flat side;'insulation between said elementand said side; and means for holding said element against saidinsulation.

7. In a liquid heater, the combination of: a flat heating element; aflexible cord connecting said heating element to an outside circuit; acirculating chamber having a flat side; a second circulating chamberalso having a fiat side; means for insulating said element between saidflat sides; and means for pressing said flat sides against said meansfor insulating.

8. In a liquid heater, the combination of: a fiat heating element; aflexible cord connecting said heating element to an outside circuit; acirculating chamber having a flat side; a second circulating chamberalso having a flat side; a container surrounding said circulatingchambers; means for insulating said element between said flat sides; and

means for pressing said flat sides against for insulating said elementbetween said flat,

sides;'and means for pressingsaid flat sides against said means forinsulating.

10. Ina liquid heater, the combination of: a" flat heating element; aflexible cord connecting said heating element to an outside circuit; acirculating chamber having a flat side; a second circulating chamberalso having a flat side; a container surrounding said circulatingchambers; means for admitting water through the wall of said containerand into one of said chambers; water conducting means connecting saidchambers; a water outlet connected to the other of said chambers andpassing through the walls of said container; means for insulating saidelement between said flat sides; and means for pressing said flat sidesagainst said means for insulating.

In testimony whereof, I have hereunto set my hand at Bakersfield,California, this 8th day of April 1921.

GEORGE W. HEWITT.

